CN110520605A - The method that detection dosing valve opens or closes event - Google Patents

The method that detection dosing valve opens or closes event Download PDF

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Publication number
CN110520605A
CN110520605A CN201880023074.3A CN201880023074A CN110520605A CN 110520605 A CN110520605 A CN 110520605A CN 201880023074 A CN201880023074 A CN 201880023074A CN 110520605 A CN110520605 A CN 110520605A
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Prior art keywords
valve
voltage
event
local maximum
change rate
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CN201880023074.3A
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CN110520605B (en
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M·A·赛克斯
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Delphi Intellectual Property Ltd
Delphi Technologies IP Ltd
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Delphi Intellectual Property Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0248—Injectors
    • F02M21/0251—Details of actuators therefor
    • F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/04—Filtering activity of particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/05—Systems for adding substances into exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/01—Adding substances to exhaust gases the substance being catalytic material in liquid form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F01N2610/146—Control thereof, e.g. control of injectors or injection valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1821—Injector parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
    • F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

A method of the valve in the reducing agent injector valve of detection solenoid operation opens or closes event, comprising the following steps: a) Xiang Suoshu solenoid applies voltage to activate the valve, and the voltage has chopped waveform；B) it is sampled at local maximum and minimum value to by solenoidal resultant current；C) difference between local maximum and subsequent local minimum or between local minimum and subsequent local maximum is determined；D) change rate of the difference is determined；E) determine that valve opens or closes event based on the change rate in step d).

Description

The method that detection dosing valve opens or closes event
Technical field
The present invention relates to for the reducing agent of such as urea being ejected into vehicle exhaust system injector valve (quantitatively to Glassware), and injection is such as blocked more particularly to for determining the method for opening or closing event of valve, such as detecting The purpose of the doser of the maloperation of device.
Background technique
In modern engine systems, reducing agent such as urea is usually ejected into exhaust system with the row of control by injector It puts.Injector is commonly known as doser, and is commonly known as SCR (selection using the system of these dosers Property catalysis reduction) system.This injector is usually solenoid-actuated injector；Wherein solenoidal activation operation valve is to allow Reducing agent such as urea is ejected into exhaust system.
The known inflection point by using such as current locus (flowing through the solenoidal electric current of injector) detects dosing The state (block/do not block) of device (reducing agent injector), to determine that the effective of valve opens or closes event, to provide quantitative The instruction of the mode of operation of feed valve.However, including that chopped waveform (leads to chopper current wave being applied to solenoidal voltage Shape) in the case where, this method is difficult.The object of the present invention is to provide a kind of reducing agents for obtaining and operating about solenoid The method of the information of the mode of operation of dosage, wherein activating solenoid using chopping voltage/current waveform.
Summary of the invention
In one aspect, the valve provided in a kind of reducing agent injector valve of detection solenoid operation opens or closes thing The method of part, comprising the following steps:
A) Xiang Suoshu solenoid applies voltage to activate the valve, and the voltage has chopped waveform；
B) it is sampled at local maximum and minimum value to by solenoidal resultant current；
C) it determines between local maximum and subsequent local minimum or between local minimum and subsequent local maximum Difference；
D) change rate of the difference is determined；
E) determine that valve opens or closes event based on the change rate in step d).
Step e) can include determining that whether the amplitude of the change rate of described value is higher than threshold value, and if it is, determine There are valves to open or close event.
Step e) may include that the determining difference is increasedd or decreased with the presence or absence of step.
The sampling step b) can by make sampling time and the modulated signal that is driven about voltage synchronize execute.
This method may include determining that valve opens or closes the time according to the change rate.
On the other hand, the valve provided in a kind of reducing agent injector valve of detection solenoid operation opens or closes thing The method of part, comprising the following steps:
A) Xiang Suoshu solenoid applies voltage to activate the valve, and the voltage has chopped waveform；
B) resultant current is sampled at local maximum or local minimum；
C) according to the value forming curves figure of step b)；
D) it analyzes the curve graph and event is opened and closed with the determination valve.
Step d) may include the single order of the determining curve graph or second dervative and be compared these values with threshold value.
Step d) may include determining to interfere and thereby determine that valve opens event.
Sampling step b) can by make sampling time and the modulated signal that is driven about voltage synchronize execute.
Detailed description of the invention
The present invention is described by way of embodiment referring now to the drawings, in which:
Fig. 1 shows application/existing voltage and ultimate current between the terminal of reducing agent injector (solenoid) Curve graph；
Fig. 2 shows due to operating at 48V and by the increase of solenoidal electric current；
Fig. 3 shows the use in short distractor stage；
The traction stage (opening stage) and the current graph during the copped wave traction stage that Fig. 4 shows non-copped wave 12V system；
Fig. 5 is shown in which the curve graph for the chopper current track and sampled point that the voltage applied is chopped into；
Fig. 6 is the curve graph similar with Fig. 5, it illustrates identical electric current (copped wave) track, wherein execute sampling with Electric current is captured at local maximum (sampled point)；
Fig. 7 a and Fig. 8 a show the curve graph of (copped wave) electric current similar to Fig. 4 and Fig. 5, and it illustrates local maximums With the sampled point of local minimum；
Fig. 7 b and Fig. 8 b respectively illustrate the curve graph corresponding to Fig. 7 a and Fig. 8 a, and it illustrates delta current (Δ I) Curve graph relative to the time.
Specific embodiment
Fig. 1 shows voltage 1 and resultant current between the terminal for applying/being present in reducing agent injector (solenoid) 2 curve graph, that is, be considered doser (injector solenoid).As can be seen that being increased by the initial step for providing voltage Activate doser in Calais.Therefore, it is gradually increasing by the electric current of doser (injector solenoid) to reach peak value. In the time shown in circle A, injector is opened.Electric current reaches by the plateau value of circle B instruction, and the voltage applied later is cut Reducing agent injector is maintained at open position by wave.Then, it is begun to decline by the electric current of injector, as shown in the figure.In Time C, the voltage at injector both ends, which is set, to be negative, and doser is begun to shut off；Electric current is quickly decreased to close to zero Level.So during this period of time injector is closed.
Often the track of analysis electric current is to provide useful data.It it is known that at the point at the end of traction stage from R The resistance that=V/I is calculated infers the temperature of doser；That is, in the platform by the circle B label in Fig. 1.Such as Fig. 1 institute Show, observes inflection point/interference 3 in circle A.The first derivative and/or second dervative of electric current can identify the interference/influence point. It is known by detection current locus in inflection point/noise spot come detect doser (reducing agent injector) state (block/ Do not block), the inflection point/noise spot instruction dosing valve movement, that is, valve is opened.The electric current flowed in doser It is entirely the function of the electrical characteristics of supply voltage and doser.Therefore, Fig. 1 show during the traction stage specified rate to The case where typical supply voltage of the 12V [8-16V] of glassware power supply；The voltage applied is continuous.
Off-road vehicle is usually run at 24V, and expected vehicle electrical systems will be transitioned into 48V from 12V.This is because The advantages of 48V power supply and mild hybrid power system.In this vehicle, do not have 24V/48V preferably to the conversion of 12V power supply Device.Therefore, it is desirable to 24V/48V rather than 12V driving such as SCR doser component.For the traction stage in 24V/ Doser is operated continuously under 48V will imply that high current or very short holding stage.Fig. 2 shows due at 48V It operates and passes through the increase of solenoidal electric current.Electric current increase will generate undesirable additional fever.
Fig. 3 is shown for will be by the use of the short distractor stage Tpi of solenoidal current limit to acceptable limit. However, this electric current for resulting in coil resistance is unstable.Although this can complete (limitation electric current) during the hold stage, It is that precision will be damaged due to low current level.
For higher voltage source, inventor has determined that applied voltage can be chopped into, to generate such as Fig. 4 Shown in corresponding chopped waveform.This illustrates (open rank in the traction stage of non-copped wave 12V system 4 and copped wave traction stage 5 Section) during current graph.
Although being had the above advantages using chopped waveform, the problem of chopping method, is, except non-sampled very fast, otherwise Start (SOI) (inflection point) using traditional technique in measuring dosimeter opening point or injection and will not work.Two electricity in above-mentioned figure Flowing waveform has quick initial current rate.These will lead to doser and open faster.At hydraulic aspect, this will tool There are some benefits, but the service life for wearing and influencing faster product will be introduced in mechanical aspects.Another example is in 24/48V It is lower driving doser and under 50/25% duty ratio Chopper driving signal method, this method is effectively by driving voltage Change into 12V.Fig. 4 has been shown in particular in 12 volts (non-copped waves) and the electric current under 48 volts of 25% duty ratio 40us period copped wave Track.However, in summary, due to cannot current signal be sampled and be handled in a conventional manner, which results in known The problem of injection starts (doser opening) detection method.
In an aspect, in such as rising or falling to solenoid/injector pwm voltage drive waveforms The sampling is executed in a synchronous manner during driving logic.In this way, the point of local maximum and/or minimum value is sampled and is used for It analyzes to detect the beginning of injection.This can by will now be described it is various in a manner of complete.
Technology 1
In one aspect, this method relative to voltage (drive waveforms) rise or fall driving logic during with synchronization Mode sample rate current, to capture the point of local maximum and/or minimum value.Then plot is provided using these points, It is middle to detect the beginning of injection using then known analytical technology, such as by observing interference etc..Fig. 5, which is shown, to be applied The curve graph for the current locus that voltage is chopped into: appended drawing reference 10 shows current locus, and point 11 is shown from curve graph 10 Sampled point, these sampled points are acquired and are used for subsequent analysis.Sampled point 11 be with applied alive pulsewidth modulation It is obtained at the sampling time that stage synchronizes, wherein current value is in local minimum.Fig. 6 is similar figure, it illustrates Identical electric current (copped wave) track 10 samples wherein executing to capture electric current at local maximum (sampled point) 12, equally, this It is that the synchronizing to realize of sampling is executed by appropriate time in a pwm cycle.
In any case, point can be connected by any type of interpolation/curve fitting technique, from sampled point Derived curve/full curve.Then the known technology of standard can be used, such as find inflection point/noise spot (for example, by looking into See single order/second dervative), since these figures put or derived curve determine spray site (doser opening).
Technology 2
Fig. 7 a and Fig. 8 a show the curve graph of (copped wave) electric current similar to Fig. 4 and Fig. 5, and it illustrates local maximums With the sampled point of local minimum.In one approach, electric current is carried out in the rising edge of chopper current and drop edge again Sampling.In the art, it is determined that between local minimum and subsequent local maximum (or local maximum and subsequent office Between portion's minimum value) difference measurement.It in other words, it is determined the value difference between local minimum and subsequent local maximum. These differences can be drawn relative to the time.Alternatively, the value difference between local maximum and subsequent minimum value is drawn.Root It changes with time according to curve graph or difference, the beginning (can detecte doser opening) of opening is as described below.
Fig. 7 b and Fig. 8 b respectively illustrate the curve graph corresponding to Fig. 7 a and Fig. 8 a, and it illustrates delta current (Δ I) Curve graph relative to the time.Δ I is the difference between the adjacent minimum value of the figure in 7a and Fig. 8 a and maximum value.As described above, The alternative solution can be the difference between adjacent minimum value and maximum value.Thus, for example, the value of Δ I is for example to scheme for Fig. 7 a The value of current difference between the point 13 of 7a and point 14, point 15 and point 16 etc..Optionally, this can be a little 14 and 15,16 and 17 etc. Between difference.
It can be seen that work as when observing Δ I and changing with time and start injection (generation dosing at second time T=1 Device is opened) when, which has significant step to increase.
Step increases indication valve and opens event, and step reduces indication valve close event.In general, can analyze the variation of difference Rate, such as be compared with threshold value to provide the instruction of these events.

Claims (9)

1. the method that the valve in a kind of reducing agent injector valve of detection solenoid operation opens or closes event, including following step It is rapid:
A) Xiang Suoshu solenoid applies voltage to activate the valve, the voltage due to applying modulated signal to voltage driver and With chopped waveform；
B) it is sampled at local maximum and minimum value to by solenoidal resultant current；
C) determine between local maximum and subsequent local minimum or local minimum and subsequent local maximum it Between difference；
D) change rate of the difference is determined；
E) determine that valve opens or closes event based on the change rate in step d).
2. according to the method described in claim 1, wherein, step e) include the change rate of determining described value amplitude whether Higher than threshold value, and if it is, determine that there are valves to open or close event.
3. method according to claim 1 or 2, wherein step e) includes determining in the difference to increase with the presence or absence of step It adds deduct small.
4. according to claim 1 to method described in 3, wherein by making sampling time and the modulated signal about voltage driving It synchronizes to execute the step b) of the sampling.
5. method according to any preceding claims, this method includes determining that valve plays on or off according to the change rate Close the time.
6. the method that the valve in a kind of reducing agent injector valve of detection solenoid operation opens or closes event, including following step It is rapid:
A) Xiang Suoshu solenoid applies voltage to activate the valve, the voltage due to applying modulated signal to voltage driver and With chopped waveform；
B) resultant current is sampled with local maximum or local minimum；
C) pass through the value forming curves of step b)；
D) it analyzes the curve and event is opened and closed with the determination valve.
7. according to the method described in claim 6, wherein, step d) includes the single order or second dervative and will of the determining curve These values are compared with threshold value.
8. method according to claim 6 or 7, wherein step d) includes determining to interfere and thereby determine that valve opens event.
9. the method according to claim 6 to 8, wherein by making sampling time and the modulated signal about voltage driving It synchronizes to execute the step b) of the sampling.
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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11230990B2 (en) 2019-11-11 2022-01-25 Caterpillar Inc. Method and system for valve movement detection
US11220969B1 (en) * 2021-03-18 2022-01-11 Ford Global Technologies, Llc Methods and systems for improving fuel injection repeatability
US11313310B1 (en) * 2021-05-04 2022-04-26 Ford Global Technologies, Llc Methods and systems for improving fuel injection repeatability

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101010503A (en) * 2004-04-28 2007-08-01 西门子公司 Method for determining the closing time for a closing body and circuit arrangement
DE102011078161A1 (en) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Method for detecting needle movement of metering valve for controlling e.g. usage amount of reducing agent in exhaust after-treatment system, involves adding the differences of comparison results, to obtain quality number for valve
CN103168165A (en) * 2010-08-26 2013-06-19 大陆汽车有限公司 Method and device for detecting when a closing point of a hydraulic valve has been reached
CN103375378A (en) * 2012-04-11 2013-10-30 Ti汽车燃油系统公司 Method for monitoring a fluid injection system and system thereof
CN103534470A (en) * 2011-06-07 2014-01-22 Ge延巴赫两合无限公司 End-position-monitoring device of a gas injector
WO2016173774A1 (en) * 2015-04-28 2016-11-03 Delphi International Operations Luxembourg S.À R.L. Urea dosing method for vehicle exhaust systems
CN106246307A (en) * 2016-08-30 2016-12-21 潍柴动力股份有限公司 A kind of detection method and device

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420282A1 (en) * 1994-06-10 1995-12-14 Bosch Gmbh Robert Method and device for controlling an electromagnetic consumer
DE10139142A1 (en) * 2001-08-09 2003-02-20 Bosch Gmbh Robert Exhaust gas treatment unit and measuring device for determining a concentration of a urea-water solution
JP4326976B2 (en) * 2003-10-22 2009-09-09 日産ディーゼル工業株式会社 Engine exhaust purification system
EP3421744B1 (en) * 2005-12-22 2022-05-04 Emitec Denmark A/S A fluid transfer system and method
JP4857821B2 (en) * 2006-03-06 2012-01-18 日産自動車株式会社 Vehicle control method and control device
DE102006044080B4 (en) * 2006-09-20 2023-10-12 Robert Bosch Gmbh Method for operating a reagent metering valve and device for carrying out the method
DE102006059625A1 (en) 2006-12-14 2008-06-19 Robert Bosch Gmbh Device and method for controlling an electromagnetic valve
JP4906525B2 (en) * 2007-01-26 2012-03-28 ボッシュ株式会社 Clogging determination device for reducing agent injection valve and clogging determination method for reducing agent injection valve
US8027751B2 (en) 2007-07-16 2011-09-27 Delphi Technologies Holding S.Arl Fluid delivery system
US7971426B2 (en) * 2007-11-01 2011-07-05 Ford Global Technologies, Llc Reductant injection system diagnostics
EP2060762A1 (en) 2007-11-15 2009-05-20 Delphi Technologies, Inc. Glitch detector and method of detecting glitch events
KR100907363B1 (en) * 2008-03-03 2009-07-10 현대자동차주식회사 Method for controlling urea-scr system
DE102008001789A1 (en) * 2008-05-15 2009-11-19 Robert Bosch Gmbh Method for operating a metering valve and device for carrying out the method
DE102009023325B4 (en) * 2008-12-10 2012-01-26 Continental Automotive Gmbh Method for adapting the injection of injection agent in an injection system
DE102009010888B4 (en) * 2009-02-27 2012-02-02 Continental Automotive Gmbh Method and device for controlling an SCR exhaust aftertreatment system of an internal combustion engine
DE102009056181A1 (en) * 2009-11-27 2011-06-01 Emitec Gesellschaft Für Emissionstechnologie Mbh Method for operating a delivery device for a reducing agent
BR112012032551A2 (en) 2010-06-23 2016-11-22 Inergy Automotive Systems Res "method for monitoring a scr system"
DE102012209967A1 (en) 2012-06-14 2013-12-19 Robert Bosch Gmbh Method of operating solenoid valve, involves comparing time integral with threshold value such that to judge state of solenoid valve
DE102012216611A1 (en) * 2012-09-18 2014-04-10 Robert Bosch Gmbh Method for operating magnetic valve used in exhaust system of motor car, involves determining two values of electrical state variable of magnetic valve before or after start and end of movement control and before start of valve element
US9759116B2 (en) * 2013-10-29 2017-09-12 Continental Automotive Systems, Inc. Method and apparatus for detecting selective catalytic reduction injector opening time
DE102015204545A1 (en) * 2015-03-13 2016-09-15 Robert Bosch Gmbh Evaluation method and device for diagnosing a metering valve
US10851695B2 (en) * 2016-12-16 2020-12-01 Robert Bosch Gmbh Exhaust gas aftertreatment system for diesel engine and method of detecting abnormal injection

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101010503A (en) * 2004-04-28 2007-08-01 西门子公司 Method for determining the closing time for a closing body and circuit arrangement
CN103168165A (en) * 2010-08-26 2013-06-19 大陆汽车有限公司 Method and device for detecting when a closing point of a hydraulic valve has been reached
DE102011078161A1 (en) * 2011-03-03 2012-09-06 Robert Bosch Gmbh Method for detecting needle movement of metering valve for controlling e.g. usage amount of reducing agent in exhaust after-treatment system, involves adding the differences of comparison results, to obtain quality number for valve
CN103534470A (en) * 2011-06-07 2014-01-22 Ge延巴赫两合无限公司 End-position-monitoring device of a gas injector
CN103375378A (en) * 2012-04-11 2013-10-30 Ti汽车燃油系统公司 Method for monitoring a fluid injection system and system thereof
WO2016173774A1 (en) * 2015-04-28 2016-11-03 Delphi International Operations Luxembourg S.À R.L. Urea dosing method for vehicle exhaust systems
CN106246307A (en) * 2016-08-30 2016-12-21 潍柴动力股份有限公司 A kind of detection method and device

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